Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
March 13, 2023
Submitted
April 12, 2023
Operation
Air carrier
Aircraft
N956WN
Make and model
Boeing 7377H4
Aircraft serial
36672
Aircraft time
38,868 hours, 23,696 cycles
Part
Stiffener
Condition
Cracked
Location
Zn 100 Fus Lower
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

STIFFENER P/N 111A1308-16 IS CRACKED BS 663 RH VAPOR BARRIER RBL 25 W/L 148<[01] VERYFIED APPLICABILITY IAW SRM 53-10-10-1A-2 ALLOWABLE DAMAGE; FOUND OUT OF LIMITS IAW SRM 53-10-10-1A-2; 4(E);[02] REMOVED STIFFENER P/N 111A1308-16 IAW SRM 51-40-02-0G-0.<BR>UPDATED MEASUREMENT TABLE.;[03] LOCATED AND DRILLED NEW STIFFENER P/N 111A1308-16 IAW SRM 51-40-05-0G-0 AND DWG 111A1000. REQUEST OK TO INSTALL.;[04] EDIT CORRECTIVE ACTIION STEP 1; CRACK ON STIFFENER BS 663 RBL 25 WL 148 IT'S OUT OF LIMITS NOT ARE LIMITS GIVEN IN THE SRM BY REPAIRED BY REPLACEMENT OF PART IAW SRM 51-10-02 PAR 9.;[05] VERIFIED CORRECTIVE ACTION 4 AND MEASUREMENT TABLE;[06] VERIFIED CORRECTIVE ACTION 3. OK TO INSTALL.;[07] INSTALLED NEW STIFFENER AT BS 663; RBL 25; WL 148 IAW SRM 51-40-02 AND DWG: 111A1000 AND DWG: 149A7210.;[08] APPLICABILITY STATEMENT IAW SRM 57-10-10-1A-2 ;4 (E) FOR ALLOWABLE DAMAGE;[09] VERIFIED CORRECTIVE ACTION 7 INSTALLATION;[10] VERIFIED CORRECTIVE ACTION 8 APPLICABILITY;[11] SIGNED FOR PART;[12] TASK COMPLETE

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